“My fellow Americans, I'm pleased to tell you today that I've signed legislation that will outlaw Russia forever. We begin bombing in five minutes.”
Joking during a microphone check. The joke was later leaked to the general populace and, upon learning of it, Soviet defenses went on high alert. http://en.wikipedia.org/wiki/Reagan%27s_%22We_begin_bombing_in_five_minutes%22_joke http://www.npr.org/news/specials/obits/reagan/audio_archive.html (11 August 1984)
1980s, First term of office (1981–1985)
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Ronald Reagan 264
American politician, 40th president of the United States (i… 1911–2004Related quotes

As quoted in "The Passing of a Great Mind" by Clay Blair, Jr., in LIFE Magazine (25 February 1957), p. 96

According to R. Ken Rasmussen in The Quotable Mark Twain (1998), this is most probably not Twain's.
Misattributed

Lithium.
Song lyrics, Nevermind (1991)
Variant: I'm so happy
'Cause today I found my friends
They're in my head.
I'm so ugly, that's okay
'Cause so are you,
Broke our mirrors.
Source: Nirvana

Stubborn Kind of Fellow, co-written with William "Mickey" Stevenson and George Gordy.
Song lyrics, That Stubborn Kinda Fellow (1962)

“He who asks is a fool for five minutes, but he who does not ask remains a fool forever.”

Tweeted https://twitter.com/Klitschko/status/1519008421500043266 26 April 2022 during the Russian invasion of Ukraine